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답안 #397296

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
397296 2021-05-01T20:36:49 Z JerryLiu06 공장들 (JOI14_factories) C++11
100 / 100
 4627 ms 178972 KB 
#include <bits/stdc++.h>
#include "factories.h"
 
using namespace std;
 
using ll = long long;
using db = long double;
using str = string;
 
using pi = pair<int, int>;
using pl = pair<ll, ll>;
using pd = pair<db, db>;
 
using vi = vector<int>;
using vb = vector<bool>;
using vl = vector<ll>;
using vd = vector<db>;
using vs = vector<str>;
using vpi = vector<pi>;
using vpl = vector<pl>;
using vpd = vector<pd>;
 
#define mp make_pair
#define f first
#define s second
 
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define sor(x) sort(all(x))
#define ft front()
#define bk back()
#define pb push_back
#define pf push_front
 
#define lb lower_bound
#define ub upper_bound
 
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define R0F(i, a) ROF(i, 0, a)
#define EACH(a, x) for (auto& a : x)
 
const int MOD = 1e9 + 7;
const int MX = 5e5 + 10;
const ll INF = 1e18;
 
int N; vpi adj[MX]; int sub[MX], num[MX], par[MX]; ll dist[MX][20], ans[MX]; bool vis[MX];
 
void DFS1(int X, int P) {
    sub[X] = 1; EACH(Y, adj[X]) if (Y.f != P && !vis[Y.f]) { DFS1(Y.f, X); sub[X] += sub[Y.f]; }
}
int centroid(int X, int P, int S) {
    EACH(Y, adj[X]) if (Y.f != P && !vis[Y.f] && sub[Y.f] > S / 2) return centroid(Y.f, X, S); return X; 
}
void DFS2(int X, int P, ll D) {
    dist[X][num[X]++] = D; EACH(Y, adj[X]) if (Y.f != P && !vis[Y.f]) DFS2(Y.f, X, D + Y.s);
}
void decomp(int X, int P) {
    DFS1(X, 0); int C = centroid(X, 0, sub[X]); vis[C] = true; par[C] = P;
 
    DFS2(C, P, 0); EACH(Y, adj[C]) if (!vis[Y.f]) decomp(Y.f, C);
}
void update(int X, int T) {
    int Y = X; int ind = num[X] - 1;
 
    while (Y != 0) { if (T == 1) ans[Y] = min(ans[Y], dist[X][ind]); else ans[Y] = INF; Y = par[Y]; ind--; }
}
ll query(int X) {
    int Y = X; int ind = num[X] - 1; ll res = INF; 
 
    while (Y != 0) { res = min(res, ans[Y] + dist[X][ind]); Y = par[Y]; ind--; } return res;
}
void Init(int _N, int A[], int B[], int D[]) {
    N = _N; F0R(i, N - 1) { A[i]++, B[i]++; adj[A[i]].pb({B[i], D[i]}), adj[B[i]].pb({A[i], D[i]}); }
 
    decomp(1, 0); FOR(i, 1, N + 1) ans[i] = INF;
}
ll Query(int S, int X[], int T, int Y[]) {
    ll res = INF; F0R(i, S) update(++X[i], 1);
 
    F0R(i, T) res = min(res, query(++Y[i])); F0R(i, S) update(X[i], 0); return res;
}

Compilation message

factories.cpp: In function 'int centroid(int, int, int)':
factories.cpp:42:20: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   42 | #define EACH(a, x) for (auto& a : x)
      |                    ^~~
factories.cpp:54:5: note: in expansion of macro 'EACH'
   54 |     EACH(Y, adj[X]) if (Y.f != P && !vis[Y.f] && sub[Y.f] > S / 2) return centroid(Y.f, X, S); return X;
      |     ^~~~
factories.cpp:54:96: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   54 |     EACH(Y, adj[X]) if (Y.f != P && !vis[Y.f] && sub[Y.f] > S / 2) return centroid(Y.f, X, S); return X;
      |                                                                                                ^~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 12620 KB Output is correct
2 Correct 362 ms 30664 KB Output is correct
3 Correct 385 ms 30708 KB Output is correct
4 Correct 386 ms 30712 KB Output is correct
5 Correct 404 ms 30996 KB Output is correct
6 Correct 284 ms 30792 KB Output is correct
7 Correct 385 ms 30748 KB Output is correct
8 Correct 399 ms 30816 KB Output is correct
9 Correct 401 ms 30852 KB Output is correct
10 Correct 287 ms 30776 KB Output is correct
11 Correct 407 ms 30656 KB Output is correct

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12236 KB Output is correct
2 Correct 2186 ms 132096 KB Output is correct
3 Correct 3426 ms 151420 KB Output is correct
4 Correct 903 ms 151024 KB Output is correct
5 Correct 4241 ms 174832 KB Output is correct
6 Correct 3229 ms 153680 KB Output is correct
7 Correct 993 ms 58440 KB Output is correct
8 Correct 496 ms 59124 KB Output is correct
9 Correct 1103 ms 62072 KB Output is correct
10 Correct 967 ms 59748 KB Output is correct

Subtask #3
67.0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 12620 KB Output is correct
2 Correct 362 ms 30664 KB Output is correct
3 Correct 385 ms 30708 KB Output is correct
4 Correct 386 ms 30712 KB Output is correct
5 Correct 404 ms 30996 KB Output is correct
6 Correct 284 ms 30792 KB Output is correct
7 Correct 385 ms 30748 KB Output is correct
8 Correct 399 ms 30816 KB Output is correct
9 Correct 401 ms 30852 KB Output is correct
10 Correct 287 ms 30776 KB Output is correct
11 Correct 407 ms 30656 KB Output is correct
12 Correct 9 ms 12236 KB Output is correct
13 Correct 2186 ms 132096 KB Output is correct
14 Correct 3426 ms 151420 KB Output is correct
15 Correct 903 ms 151024 KB Output is correct
16 Correct 4241 ms 174832 KB Output is correct
17 Correct 3229 ms 153680 KB Output is correct
18 Correct 993 ms 58440 KB Output is correct
19 Correct 496 ms 59124 KB Output is correct
20 Correct 1103 ms 62072 KB Output is correct
21 Correct 967 ms 59748 KB Output is correct
22 Correct 2385 ms 157908 KB Output is correct
23 Correct 2518 ms 160544 KB Output is correct
24 Correct 3745 ms 159812 KB Output is correct
25 Correct 3720 ms 163536 KB Output is correct
26 Correct 3688 ms 159892 KB Output is correct
27 Correct 4627 ms 178972 KB Output is correct
28 Correct 1042 ms 161496 KB Output is correct
29 Correct 3809 ms 159880 KB Output is correct
30 Correct 3882 ms 159176 KB Output is correct
31 Correct 3893 ms 159612 KB Output is correct
32 Correct 1164 ms 62936 KB Output is correct
33 Correct 485 ms 59612 KB Output is correct
34 Correct 777 ms 56260 KB Output is correct
35 Correct 779 ms 56132 KB Output is correct
36 Correct 986 ms 56660 KB Output is correct
37 Correct 971 ms 56628 KB Output is correct